Product Name:Naproxen （USP32）
Cas No.:22204-53-1
Molecular Formula:C14H14O3
Appearance: White or offer white crystalline powder
Assay: 98.0%～102.0%
Identification:
   1) IR Absorption - As per reference standard
   2) UV Absorption - Do not differ by more than 3% at 272nm
Loss on drying: 1.0% max.
Specific rotation: -15.3° ～-17.0°
Heavy metals: 0.002% max.
Free naproxen: 1.0% max.
Residual Solvent Acetone: 0.5% max.
Chromatographic purity
   1)Any single impurity: 0.5%max.
   2)Total impurities: 2.0% max.
Packing: 25kg/ fibre drum
Storage:  kept at cool, shadow place
Shelf life: 3 years under proper storage